Edge anchor for building sheets



May 10, 1932. J, $|EGFR1ED 1,858,221

EDGE ANCHOR FOR BUILDING SHEETS Filed March 31. 1950 WWW K0 INVENTOR. 21 D 1 9 Jase/7i? Jiegfrz'ed,

51 ATTORNEYS Patented May 10, 1932 JOSEPH SIEGFRIED, OF LA FAYETTE, INDIANA EDGE ANCHOR FOR BUILDING SHEETS Application filed March 31, 1930. Serial No. 440,413.

ding or furring and it has heretofore been customary to provide cross furring as a background for attachment of the horizontal edges. When such building sheets receive a finishing coating of plaster, cracks often develop in the plaster adjacent the horizontal meeting edges of the sheet material.

The object of my present invention is to provide, as an article of manufacture, a sheet metal anchor strip which may be readily associated with the otherwise unsupported abutting edges of such sheet building material and secured at its ends to vertical studding by fastening nails which pass through the sheet material, one form of my invention being particularly designed for use when a finish coating of plastering is to be applied and of such construction as to form a firm anchor for the plaster which bridges the abutting edges of the two sheets of building material in such manner as to prevent the formation of cracks in the plaster.

The accompanying drawings illustrate my invention.

Fig. 1 is an elevation of an embodiment of my invention in the plaster-retaining form;

Fig. 2 is an end elevation of the structure shown in Fig. 1;

Fig. 3 is an elevation of the side opposite to that shown in Fig. 1;

Fig. 4 is a side elevation of another embodiment of my invent-ion, particularly designed for use where a plaster finish is not to be applied;

Fig. 5 is an end elevation of the form shown in Fig. 4;

Fig. 6 is a fragmentary perspective of the form shown in Fig. 1;

Fig. 7 is a fragmentary perspective of an assembly of sheet building material and associated anchor strip;

Fig. 8 is a plan of the blank from which the form shown in Fig. 1 is produced, and

Fig. 9 is a plan of the blank from which the form shown in Figs. 4L and 5 is folded.

In the drawings 10 indicates a strip of sheet metal, conveniently four feet long, (the usual width of sheet building material of the character described), perforated adjacent its two edges by perforations 11 to form diagonal bars 12; perforated at 13, 13 transversely of its middle; and folded along the fold lines 14, 15, 16, 17 and 18 to produce a double-channel-shaped element comprising the single-thickness arms 19, 19 which are arranged in a common plane, the double thickness fingers 20, 20 alternately oppositely directed in a common plane spaced from arms 19, 19 a distance substantially equal to the thickness of the sheet building material which is to be used, and the connecting intermediate portions 21, 21 which are closely adj acent each other and at right angles to the arms 19 and the fingers 20. The diagonal bars 12 are twisted and bowed outwardly, for a purpose which will appear. Each perforation 13 is preferably diamond-shaped symmetrical with the center line 16 as shown in Figs. 8 and 9 to facilitate the formation and bending of the double-thickness fingers, and between the perforations the material is perforated at 23, 23 symmetrically relative to the fold line 16.

In the form shown in Figs. 4:, 5 and 9 fingers 19 which correspond with the arms 19 of the other form, are arranged to register with the double-thickness fingers 16, and are perforated at 23 to register with perforations 23, the remainder of the structure being the same as in the form shown in Figs. 1 to 3 and 8.

In use, a sheet of building material is preliminarily attached at its vertical edges to studding 31 by nails 32. One of my anchor strips is then slipped over the upper edge of sheet 30 with arms 19 outward and one series of fingers20 between the sheet and the studding, and a nail 32 is driven through a perforation 11, the sheet material, and the underlying registering perforation 23 in a finger 20. The lower edge of a sheet 30 is then placed between the upwardly extending arm 19 and the other series of fingers 20 and said sheet is secured in place in the manner already described.

The anchor strip thus forms a rigid support for the entire horizontal edge of each of the abutting sheets, without the necessity of cross furring, and when plaster is applied to the exposed faces of the building sheets it will become firmly interlocked with the outwardly twisted and bowed bars 12 of arms 19 so that cracking at the junction line between the two sheets of material will be prevented.

This form may be conveniently used when the building sheets are not to receive a coating of plaster.

F or instance, where the sheet material is used as sheeting under thick veneer, moisture is apt to collect in the dead air space tending to produce buckling of the sheet material. In such construction my improved anchor holds abutting edges of the sheetmaterial in place and thus retains the full insulating value of the sheeting.

It should be understood that the term plaster used herein is intended to include stucco and other available coating plastics.

The anchor, in either form, may be readi- 1y cut into short-er lengths, where needed, and it is for this reason that the intermediate fingers are perforated for nail reception so as to register with variously spaced st-udding and furring.

From the above the use of the form shown in Figs. 4 and 5 will be readily apparent.

I claim as my invention:

1. As an article of manufacture, an anchor strip for sheet building material consisting of a sheet of metal transversely plurally slit across an intermediate fold line and bent along said intermediate longitudinal fold and adjacent parallel fold lines to form two series of oppositely-projecting double-thickness fingers, and bent along two other parallel fold lines to form two oppositely-projecting arms substantially parallel with the double-thickness fingers and forming therewith two oppositely-presented channels.

2. An article of the character specified in claim 1 wherein the single-tl1ickness arms are so perforated as to form a plurality of cross bars outwardly bowed to form plaster anchorages.

3. An article of the character specified in claim 1 havingintegral laterally-projecting plaster-retaining elements.

4. As an article of manufacture, an anchor stri for sheet building material con.- sisting of a sheet of metal transversely plurally slit and bent along intermediate longitudinal fold lines to form two oppositely presented channels each formed with one single-thickness arm and a plurality of double-thic-kness spaced fingers, said fingers and arms being perforated for the passage of fastening nails, and said arms being so perforated as to form a plurality of cross bars outwardly bowed to form plaster anchorages.

5. As an article of manufacture, an anchor strip for sheet building material consisting of a sheet of metal having a portion plurally perforated and bent along longitudinal fold lines to form two series of oppositely-projecting double-thickness fingers, and bent along two other parallel fold lines to form two oppositely projecting arms substantially parallel with the double-thickness fingers and forming therewith two oppositely presented channels, said arms being plurally perforated to form a plurality of spaced bars, and said bars being bowed laterally from the main plane of said arms and twisted about their lengths, substantially as described.

In witness whereof I have hereunto set my hand at Indianapolis, Indiana, this 27th day of March, A. D. one thousand nine hundred and thirty.

JOSEPH SIEGFRIED. 

